I fill my glass to the top with ice, then put in liquid....I recall living in PA when a drink would arrive with two ice cubes in it. ;^) (And yes I realize I get less of whatever I’m drinking when the glass is filled with ice, it is just the way I like it.)
I keep two gallon jugs of water for drinking in the fridge, and partake liberally with a few ice cubes and slice of lime whenever I’m thirsty-I don’t really use much ice.